短語(yǔ)詞組短語(yǔ)an indispensable companion to students 學(xué)生必備的參考書(shū)be indispensable to 對(duì)必不可少;至關(guān)重要的;對(duì)?必不可少;對(duì)is indispensable to 必需的indispensable to sales promotion 不可缺少的促銷(xiāo)活動(dòng);必須促進(jìn)銷(xiāo)售;不可缺少的促銷(xiāo)in indispensable to 必不可少的indispensable to the club 不可替代球員indispensable to the society 對(duì)社會(huì)是必需的inevitable indispensable to 不可或缺的 返回 indispensable to